Last December I joined Paypal's application in Facebook called "Paypal Wishlist". You just have to create your wishlist then invite friends to create their own too. You'll get $1 for joining and another $1 for every friend that joins. Very easy, right? So I got a few friends that joined and when the promo ends the money I collected was transferred to my Paypal account! Now I have a few bucks to spend and my wishlist can come to life thanks to Facebook and Paypal. :)